Fount cut



Dec.. 242 1925.

nu hI A. J. THROM FOUNT CUT Filed June 25, 1925 IT. T

2 Sheets-Sheet 2 wmg Tamm. @www atto: ne l Patented Dec. Z2, 1925*.

vA 'IBERT 3'. THROM, 0F GRAPEVILLE, PENNSYLVANIA.

FOUNT CUT.

Application filed June 23, 1925.

To all whom t may concern.:

Be it known that ALBERT J. THRoM, Va citizen of the United States ot America, residing at Grapeville, in the county of Westmoreland and State of Pennsylvania,has invented new and useful Improvements in Fount Cuts, oi' which the following is a specification.

The object ot the invention is to provide a. glass mold particularly adapted for the production of small glass castings, such as doorvknobs, drawer lrnobs and thelike; to provide a shearing means for cutting the surplus or excess glass from the cast article in order that the usual inishing may be reduced to a minimum or dispensed with entirely; and to provide a plunger for forcing the molten glass into the mold and compressing receding elements operable by the surplus glass to make room for the latter.

With this object in view, the invention consists in a construction and combination of parts of which a preferred embodiment is illustrated in the accompanying drawings, wherein:

Figure 1 is a central longitudinal sectional view through the improved mold.

Figure 2 is a horizontal longitudinal sectional view on the plane indicated by the line 2-2 of Figure 1.

Figure 3 isa transverse vertical sectional view on the plane indicated by the line 3--3 of Figure 1.

Figure 4 is a top plan view.

The mold comprises the base member 10 Yand the complemental side members 11 and 12, the latter being hingedly connected with the base member by means of the intercurrent eyes 13 which engage a pin 14C upstanding from and set in the base member 10. Thus the side members may be swung laterally away from the bottom member 15 which is detachably secured to the base as byua transversely dovetailed Shaped tongue and groove connection consisting of the tongue 16 of the base which engages a corresponding groove in the member 15.

lNhen the side members are swung into abutting engagement with the bottom member 15, the mold is in condition for the casting operation and the side members are interlocked by a pin 17 engaging intercurrent eyes 1S in the mold members, this pin being provided with a right angularly disposed tang 19 for the detachable reception Serial lo. 39,078.

of a handle to permit the ready withdrawal and insertion oi the pin.

To provide for swinging the side members of the mold, tne latter are provided with integral shanks 20 threaded, as at 21, Afor the detachable reception ot handles to permit of their ready movement.

Complemental to the bottom member 15 is ydetachable shell 22 supported on pins 23 carried by the base member 10 and this shell together' with the bottom member 15 and complemental cavities 24 in the side members, denes the shape of the articles to be cast, for example, the door knob or drawer knob 25 illustrated in Figure l.

bove the shell, the side members are hollowed out, as indicated at 26, to provide a fount for the molten glass, this ount being bounded by a peripheral flange 27 defining an opening adapted for the reception of the plunger 28. Thus, below the flange, a,

recess is provided throughout the perimeter of the fount for excess or surplus glass.

As the molten glass is poured into the tount, the plunger at this time being withdrawn or removed, it flows through the openings 30 in the shell and into the cavities 24. Thereafter by the insertion of the plunger, the latter' being carried by the chuck in the conventional press, the glass is compacted into the cavities as the plunger descends until finally the bosses 29 on the lower end of the plunger, and shaped to conform to the mouths or openings 30 in the shell, enter the latter and shear ofi or separate the surplus glass from the molded article 25, the surplus glass ilowing into the space bounding the plunger below the flange 27.

This space is not suiiicient, however, to care for all the surplus glass resulting from supplying suthcient to fully compact the same into the molded article and the plunger is, therefore, provided with receding elements 31 constituting side plates disposed on opposite sides of the plunger and interconi nected by a transverse yoke piece 32 slidingly engaging an opening 33 in the plunger and actuated by a. compression spring 34:, this spring tending to normally force the yoke on the bottom of the opening 33 and thus yieldingly hold the receding elements with their bottom edges flush with the bottom face ofthe plunger. The recession of the members 31, due to the `pressure of the excess glass, provides additional space for such excess and permits the ready entrance of the bosses 29 into the openings 30.

When knobs are cast with the faces uppermost and the fitters downward, the bottom member l5 is provided with raised ribs :35, or raised portions or" other contour, to give the fitter the desired decorative appearance; or, if the itter is of socket form, the elements 35' may be in the form of a plunger with the decorative design on the upper face. Obviously, the knobs may be cast in pos1- tions the opposite of' that shown, in which case the bottom member l5 will have simply a plainv top face and the plunger will have bosses to socket and decorate the fitter.

The shell 22 is removable, when the side members of the mold are swung to open position, by means of a tang 36 adapted for the reception of a detachable handle.

The invention having been described, what is claimed as new and useful is:

1. A mold for the purpose indicated comprising a base and movable side members secured to the base, a shell supported by the base and enclosed by `the side members, and a. plunger insertible in a space defined by the side members whenin closed position, the plunger at its lower end engaging the shell and the latter and the side members below the shell defining the sha-pe of the farticles to be cast.

base and enclosed by the side meinbers, andv a plunger insertible in a space defined by theside members when 1n closed position,

the plunger at its lower end engaging the shell and the latter and the side members below the shell dolining the shape of the articles to be cast, the plunger having a boss on its lower face entering an opening in the shell to shear the surplus glass from the cast articles.

, 3. A mold for the purpose indicated comprising a base and movable side members secured to the base, a shell supported by the base and enclosed by the side members, the latter and the shell defining the shape. of articles to be cast and the side members above the shell being hollowed out to provide a fount, and a plunger insertible in `the fount and having shell engaging means to shear the surplus glass from the cast article.

4:. A mold for the purpose indicated comprising a base and movable side members secured to the base, a shell supported by the base and enclosed by the side members, the latter and the shell defining the shape of articles to be cast and the side members above the shell being hollowed out to provide a fount, a plunger insertible in the cunt and having shell engaging means to shear the surplus glass from the cast article,

having'V shell engaging means to shear thev surplus glass from the cast article, and receding members v actuable by the surplus glass to provide space for the latter around the plunger, said receding members consisting of sliding plates mounted on opposite sides of the plunger and yieldingly impelled toward the shell engaging end of the latter.

V6. A mold for the purpose indicated comprising ak base ,and movable side members secured to the base, a shell supported by theV base and enclosed by the side members, the latter and the shell defining the shape of articles to be cast and the side members above the shell being hollowed out to provide a fount, a plunger insertible in the fount and having shell engaging means to shearthe surplus glass from the cast article, and receding members actuable by the surplus glass to provide space for the latter around the plunger, said receding members consisting of sliding plates mounted on opposite sides of the'plunger, a yoke disposed transversely of the Vplunger and traversing a slot in the latter and connected with the side plates, and a compression spring housed in the slot and bearing upon the yoke.

7. A mold for the purpose indicated comprising a base, side members having intercurrent eyes hingedly engaging a pin upstanding from the base, a bottom member mounted upon the base between the side members, a locking pin engaging intercurrent eyes in the side members when the latter are in abutting relation with said bottom member, a shell detachably supported by the base, said shell having openings and the side members being hollowed out and they and the shell defining the shape of an article to be cast, the side members being hollowed out above the shell to provide a fount for the reception of molten glass, and a plunger insertible in the forint to compress the glass into the article receiving space in the side members and the shell.

8. A mold for the purpose indica-ted comprising a base, side members having intercurrent eyes hingedly engaging a pin upstaiiding from the base, a bottom member mounted upon the base between the side members, a locking pin engaging intercurrent eyes in the side members when the latter are in abutting relation with said bottom member, a shell detachably supported by the base, said shell having openings and the side members being hollovved out and they and the shell defining the shape of an article to be cast, the side members being hollowed out above the shell to provide a 'ount for' the reception of molten glass, and a plunger insertible in the fount to compress the glass into the article receiving space in the side members and the shell, the plunger being provided With means for shearing the surplus glass from the cast article at the opening of the shell.

9. A mold for the purpose indicated comprising a base, side members having intercurrent eyes hingedly engaging a pin upstanding from the base, a bottom member mounted upon the base between the side members, a locking pin engaging intercur rent eyes in the, side members when the latter are in abutting relation with said bottom member, a shell detachably supported by the base, said shell having openings and the side members being hollowed out and they and the shell dening the shape of an article to be cast, the side members being hollowed out above the shell to provide a fount for the reception of molten glass, and a plunger insertible in the Y.tount to compress the glass into the article receiving space in the side members and tbe shell, the plunger being provided with means ttor shearing the surplus glass from the cast article at the opening of the shell, and provided with yieldable receding elements to provide space t'or the surplus glass around the plunger.

In testimony whereof he aifixes bis signature.

ALBERT J. THROM. 

